Wave is associated with matter
|
(a) When it is stationary |
|
(b) When it is in motion with the velocity of light only |
|
(c) When it is in motion with any velocity |
|
(d) None of the above |
(c) When it is in motion with any velocity
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A 10 micro-farad capacitor is charged to 500 V and then its plates are joined together through a resistance of 10 ohm. The heat produced in the resistance is
|
(a) 500 J |
(b) 250 J |
(c) 125 J |
(d) 1.25 J |
What will happen when a 40 watt, 220 volt lamp and 100 watt, 220 volt lamp are connected in series across 40 volt supply
|
(a) 100 watt lamp will fuse |
(b) 40 watt lamp will fuse |
|
(c) Both lamps will fuse |
(d) Neither lamp will fuse |
Two small spheres each having the charge +Q are suspended by insulating threads of length L from a hook. This arrangement is taken in space where there is no gravitational effect, then the angle between the two suspensions and the tension in each will be
|
(a) 180°, |
(b) 90°, |
(c) 180°, |
(d) 180°, |
Switch S of the circuit shown in figure. is closed at t = 0. If e denotes the induced
emf in L and i, the current flowing through the circuit at time t, which of the following graphs is correct
|
(a)
|
(b)
|
(c)
|
(d)
|
A particle of mass M at rest decays into two particles of masses m1 and m2, having non-zero velocities. The ratio of the de-Broglie wavelengths of the particles, 
is
|
(a) |
(b) |
(c) 1.0 |
(d) |
| C-1 (waves) | C-II (Production) |
| (1) Infra-red | P. Rapid vibration of electrons in aerials |
| (2) Radio | Q. Electrons in atoms emit light when they move from higher to lower energy level. |
| (3) Light | R. Klystron valve |
| (4) Microwave | S. Vibration of atoms and molecules |
In the electric field of a point charge q, a certain charge is carried from point A to B, C, D and E. Then the work done
|
(a) Is least along the path AB |
(b) Is least along the path AD |
|
(c) Is zero along all the paths AB, AC, AD and AE |
(d) Is least along AE |
